You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=30.1. You would like to be 95% confident that...

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=30.1. You would like to be 95% confident that your esimate is within 5 of the true population mean. How large of a sample size is required?



n =






Do not round mid-calculation. However, use a critical value accurate to three decimal places — this is important for the system to be able to give hints for incorrect answers.